diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2010-09-16 00:30:43 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-09-24 16:55:47 -0400 |
| commit | a210080195c95ebca2a517ee3057d71607aa65e0 (patch) | |
| tree | 96aa2aee4b9bdbc747b7a0d7150d0b41650ebe90 /drivers/acpi/scan.c | |
| parent | 2422084a94fcd5038406261b331672a13c92c050 (diff) | |
ACPI / ACPICA: Defer enabling of runtime GPEs (v3)
The current ACPI GPEs initialization code has a problem that it
enables some GPEs pointed to by device _PRW methods, generally
intended for signaling wakeup events (system or device wakeup).
These GPEs are then almost immediately disabled by the ACPI namespace
scanning code with the help of acpi_gpe_can_wake(), but it would be
better not to enable them at all until really necessary.
Modify the initialization of GPEs so that the ones that have
associated _Lxx or _Exx methods and are not pointed to by any _PRW
methods will be enabled after the namespace scan is complete.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index b23825ecfa3..f87f04603b6 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1431,6 +1431,7 @@ EXPORT_SYMBOL(acpi_bus_add); int acpi_bus_start(struct acpi_device *device) { struct acpi_bus_ops ops; + int result; if (!device) return -EINVAL; @@ -1438,7 +1439,11 @@ int acpi_bus_start(struct acpi_device *device) memset(&ops, 0, sizeof(ops)); ops.acpi_op_start = 1; - return acpi_bus_scan(device->handle, &ops, NULL); + result = acpi_bus_scan(device->handle, &ops, NULL); + + acpi_update_gpes(); + + return result; } EXPORT_SYMBOL(acpi_bus_start); @@ -1552,6 +1557,8 @@ int __init acpi_scan_init(void) if (result) acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); + else + acpi_update_gpes(); return result; } |